A plane and a helicopter are understood to have been involved in a mid-air collision in Bucks.
Emergency services attended the scene near Waddesdon Manor, Aylesbury, following reports of a crash shortly after midday, said Thames Valley Police.
The Air Accidents Investigation Branch (AAIB) said the collision involved a helicopter and light aircraft.
AAIB investigators have been sent to the scene, but the priority is being placed on saving lives, police said.
Buckinghamshire Fire and Rescue Service said it has seven vehicles responding to the incident, including fire engines as well as urban search and rescue vehicles.
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The latest details here
For the latest details on the Buckingahmshire plane crash read our article.
"Number of casulaties"
Thames Valley Police has issued an update to say tat they are aware of a number of casualties as a result of the crash.
It is not yet known for sure how many people were on board each aircraft or if there are any fatalities.
Ambulances on the scene
South Central Ambulance has issued a statement on their response to the crash.
They have not confirmed the number of casualties or fatalities following the mid-air collision.
South Central Ambulance Service was called at 12.09pm this afternoon to a mid-air collision involving a helicopter and an aircraft in Upper Winchendon, near Aylesbury.
We sent to the scene a number of resources, including the Thames Valley Air Ambulance, two ambulance crews, two ambulance officers and a rapid response vehicle.
There have been a number of reports of casualties at the scene but unfortunately at this stage that is all we can confirm.
Further clarification from Waddesdon Manor
A tweet has been issued by Waddesdon Manor in a bid to clarify the situation.
The crash did not happen at Waddesdon.
Emergency service response
It is understood that numerous Buckinghamshire Fire & Rescue fire engines, Thames Valley Police cars and Thames Valley Air Ambulance are present at the scene.
We also know that the Air Accidents Investigation Branch were dispatched to the scene to investigate what has happened.
Recap the facts
Here is what we now know:
- At 12.06pm on Friday (November 17) a plane and helicopter crashed in mid-air over Upper Winchendon, Buckinghamshire
- Both aircraft flew out from nearby Wycombe Air Park
- There are no military or air ambulance aircraft involved in the collision
- The crash site is about a mile and a half from the opulent Rothschild family estate, Waddesdon Manor
- The Manor is a popular tourist destination
Meanwhile there are unconfirmed reports that there have been several fatalities as a result of the mid-air collision.
There are also unconfirmed reports that bits of the two aircraft were scattered over the grounds of Waddesdon Manor.
More from Wycombe Air Park
getwestlondon has spoken with Wycombe Air Park, and the following statement was issued:
Wycombe Air Park can confirm that at 12.00pm today we were informed of an incident north-west of Aylesbury involving two aircraft from Wycombe Air Park.
Emergency services are at the scene.
The Air Accident Investigation Board have been informed and have dispatched a field investigation team.”
Military aircraft not involved
A spokesman for RAF Halton, which lies just 10 miles from the crash site has confirmed that no military aircraft were involved in the collision.
A spokesman said:
We can confirm that neither of the aircraft concerned has a connection with either our air force nor the military, and this is as much as we know at this time.
Smoke visible
Journalist Hayley O’Keefe has tweeted a picture from near the scene which shows a distinct plume of smoke coming from the direction of the crash.
Both aircraft came from Wycombe Air Park
A spokesman for the Wycombe Air Park has confirmed that both the plane and the helicopter which crashed over Upper Winchedon, near Waddeson, were from the Air Park.
Helicopter was not an air ambulance
getwestlondon has spoken with Thames Valley Air Ambulance to ascertain whether one of their helicopters may have been involved in the collision.
A spokesman from Thames Valley Air Ambulance:
I can confirm that it was not a Thames Valley Air Ambulance that was involved in the collision.
But I can confirm that we were in attendance following the incident.
I cannot confirm if there have been any fatalities at this time but as I understand it we are still on the scene.
'Busy skies'
A pilot has tweeted that he was flying over the Aylesbury area earlier today and experienced busy skies.
Residents rushed to help
getwestlondon’s sister website The Mirror has reported that locals in Upper Winchendon heard a loud bang and rushed outside to try to help.
Where did it happen?
The mid-air collision is understood to have happened over Upper Wichendon, around a mile and a half from Waddesden Manor.
A spokesman for the Manor declined to comment on the crash.
Air Accidents Investigation Branch
The Air Accidents Investigation Branch have been informed of the crash and are en route to investigate the crash, police have confirmed.
Wreckage landed at Waddesdon
The Mirror reports that the wreckage of the plane and helicopter may have been scattered across the grounds of Waddesdon Manor.
The vast estate is the property of the Rothschild family and a popular Buckinghamshire tourist destination.
Unconfirmed reports of casulaties
There are unconfirmed reports that some people may have lost their lives in the incident.
Waddesdon Parish Council said:
And our thoughts are with those involved
Buckinghamshire Fire & Rescue on the scene
The force tweeted that they are with other emergency services at the scene after the crash just after 12pm.
What we know so far
There are reports of a m-d-air collision between an aircraft and a helicopter near Waddesdon Manor.
The area has been closed to traffic as Thames Valley Police and Buckinghamshire Fire and Rescue respond to the scene.